path: root/usr.sbin/sendmail/contrib/rcpt-streaming

Message-ID: <wgKo1lW00WBw46OU8k@andrew.cmu.edu>
Date: Sun,  1 Aug 1993 00:02:57 -0400 (EDT)
From: John Gardiner Myers <jgm+@CMU.EDU>
To: sendmail@cs.berkeley.edu
Subject: contrib/rcpt-streaming
Beak: Is

This patch implements "RCPT streaming" in sendmail version 8.  This
patch is not an official part of sendmail.  Please report all problems
with this patch to jgm+@cmu.edu.

RCPT streming avoids network round trips by sending all RCPT commands
for a single SMTP transaction together.  Sendmail then waits for all
the replies, matching them up with the apropriate addresses.

Apply to the sendmail src directory (your line numbers may vary) and
compile with -DRCPTSTREAM

diff -cr ./src/deliver.c /afs/andrew.cmu.edu/system/src/local/../host/oldsmail/016/src/deliver.c
*** ./src/deliver.c	Thu Jul 22 14:28:19 1993
--- /afs/andrew.cmu.edu/system/src/local/../host/oldsmail/016/src/deliver.c	Fri Jul 30 21:11:16 1993
***************
*** 1334,1339 ****
--- 1334,1354 ----
  			register int i;
  
  			/* send the recipient list */
+ #ifdef RCPTSTREAM
+ /***********************************************************************
+  *
+  * RCPT streaming code by John G Myers, jgm+@cmu.edu
+  * This is not supported by the maintainer of sendmail.
+  * Report all bugs concerning RCPT streaming to jgm+@cmu.edu
+  *
+  ***********************************************************************
+  */
+ 			for (to = tochain; to != NULL; to = to->q_tchain)
+ 			{
+ 				smtpstreammessage("RCPT To:<%s>", m, mci,
+ 						  to->q_user);
+ 			}
+ #endif
  			tobuf[0] = '\0';
  			for (to = tochain; to != NULL; to = to->q_tchain)
  			{
diff -cr ./src/usersmtp.c /afs/andrew.cmu.edu/system/src/local/../host/oldsmail/016/src/usersmtp.c
*** ./src/usersmtp.c	Mon Jul 19 23:50:43 1993
--- /afs/andrew.cmu.edu/system/src/local/../host/oldsmail/016/src/usersmtp.c	Fri Jul 30 21:12:00 1993
***************
*** 44,49 ****
--- 44,61 ----
  
  # include <sysexits.h>
  # include <errno.h>
+ #ifdef RCPTSTREAM
+ /***********************************************************************
+  *
+  * RCPT streaming code by John G Myers, jgm+@cmu.edu
+  * This is not supported by the maintainer of sendmail.
+  * Report all bugs concerning RCPT streaming to jgm+@cmu.edu
+  *
+  ***********************************************************************
+  */
+ # include <sys/types.h>
+ # include <sys/time.h>
+ #endif
  
  # ifdef SMTP
  
***************
*** 62,67 ****
--- 74,87 ----
  char	SmtpError[MAXLINE] = "";	/* save failure error messages */
  int	SmtpPid;			/* pid of mailer */
  
+ #ifdef RCPTSTREAM
+ char	*SmtpStreamBuf;			/* buffer for streaming output */
+ int	SmtpStreamBufSize = 0;		/* allocated size of buffer */
+ char	*SmtpStreamStart;		/* pointer to text not yet written */
+ int	SmtpStreamLen = 0;		/* # chars not yet written */
+ #endif
+ 
+ 
  #ifdef __STDC__
  extern	smtpmessage(char *f, MAILER *m, MCI *mci, ...);
  #endif
***************
*** 404,410 ****
--- 424,434 ----
  {
  	register int r;
  
+ #ifdef RCPTSTREAM
+ 	sprintf(SmtpMsgBuffer, "RCPT To:<%s>", to->q_user);
+ #else
  	smtpmessage("RCPT To:<%s>", m, mci, to->q_user);
+ #endif
  
  	SmtpPhase = mci->mci_phase = "client RCPT";
  	setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase);
***************
*** 667,672 ****
--- 694,703 ----
  	bool firstline = TRUE;
  	char junkbuf[MAXLINE];
  
+ #ifdef RCPTSTREAM
+ 	extern char MsgBuf[];		/* err.c */
+ #endif
+ 
  	if (mci->mci_out != NULL)
  		(void) fflush(mci->mci_out);
  
***************
*** 682,687 ****
--- 713,755 ----
  		register char *p;
  		extern time_t curtime();
  
+ #ifdef RCPTSTREAM
+ 		if (SmtpStreamLen > 0) {
+ 		    int outfd;
+ 
+ 		    outfd = fileno(mci->mci_out);
+ 
+ 		    nonblock(outfd, TRUE);
+ 		    r = write(outfd, SmtpStreamStart, SmtpStreamLen);
+ 		    nonblock(outfd, FALSE);
+ 		    if (r == -1 && errno != EAGAIN
+ #ifdef EWOULDBLOCK
+ 			&& errno != EWOULDBLOCK
+ #endif
+ 			) {
+ 
+ 			mci->mci_errno = errno;
+ 			message("451 streamreply: write error to %s",
+ 				mci->mci_host);
+ 
+ 			/* if debugging, pause so we can see state */
+ 			if (tTd(18, 100))
+ 			  pause();
+ # ifdef LOG
+ 			if (LogLevel > 0)
+ 			  syslog(LOG_INFO, "%s", &MsgBuf[4]);
+ # endif /* LOG */
+ 			/* stop trying to write output */
+ 			SmtpStreamLen = 0;
+ 			continue;
+ 		    }
+ 		    if (r > 0) {
+ 			SmtpStreamStart += r;
+ 			SmtpStreamLen -= r;
+ 		    }
+ 		}
+ #endif /* RCPTSTREAM */
+ 
  		/* actually do the read */
  		if (e->e_xfp != NULL)
  			(void) fflush(e->e_xfp);	/* for debugging */
***************
*** 792,797 ****
--- 860,937 ----
  
  	return (r);
  }
+ 
+ #ifdef RCPTSTREAM
+ /*
+ **  SMTPSTREAMMESSAGE -- buffer message to be streamed to server
+ **
+ **	Parameters:
+ **		f -- format
+ **		m -- the mailer to control formatting.
+ **		a, b, c -- parameters
+ **
+ **	Returns:
+ **		none.
+ **
+ **	Side Effects:
+ **		stores message in SmtpStreamBuf
+ */
+ 
+ /*VARARGS1*/
+ #ifdef __STDC__
+ smtpstreammessage(char *f, MAILER *m, MCI *mci, ...)
+ #else
+ smtpstreammessage(f, m, mci, va_alist)
+ 	char *f;
+ 	MAILER *m;
+ 	MCI *mci;
+ 	va_dcl
+ #endif
+ {
+ 	VA_LOCAL_DECL
+ 	int len;
+ 
+ 	VA_START(mci);
+ 	(void) vsprintf(SmtpMsgBuffer, f, ap);
+ 	VA_END;
+ 
+ 	if (tTd(18, 1) || Verbose)
+ 		nmessage(">>> %s", SmtpMsgBuffer);
+ 	if (TrafficLogFile != NULL)
+ 		fprintf(TrafficLogFile, "%05d >>> %s\n", getpid(), SmtpMsgBuffer);
+ 
+ 	if (mci->mci_out == NULL) {
+ 	    if (tTd(18, 1)) printf("smtpstreammessage: NULL mci_out\n");
+ 	    return;
+ 	}
+ 
+ 	strcat(SmtpMsgBuffer, m == NULL ? "\r\n" : m->m_eol);
+ 	len = strlen(SmtpMsgBuffer);
+ 
+ 	if (SmtpStreamLen == 0) {
+ 	    if (SmtpStreamBufSize == 0) {
+ 		SmtpStreamBufSize = MAXLINE;
+ 		SmtpStreamBuf = xalloc(SmtpStreamBufSize);
+ 	    }
+ 	    SmtpStreamStart = SmtpStreamBuf;
+ 	}
+ 
+ 	if (SmtpStreamBufSize - SmtpStreamLen < len + 1) {
+ 	    int start = SmtpStreamStart - SmtpStreamBuf;
+ 	    SmtpStreamBufSize += MAXLINE;
+ 	    SmtpStreamBuf = realloc(SmtpStreamBuf, SmtpStreamBufSize);
+ 	    if (!SmtpStreamBuf) {
+ 		syserr("Out of memory!!");
+ 		abort();
+ 		/* exit(EX_UNAVAILABLE); */
+ 	    }
+ 	    SmtpStreamStart = SmtpStreamBuf + start;
+ 	}
+ 
+ 	strcpy(SmtpStreamBuf + SmtpStreamLen, SmtpMsgBuffer);
+ 	SmtpStreamLen += len;
+ }
+ #endif /* RCPTSTREAM */
  /*
  **  SMTPMESSAGE -- send message to server
  **
Only in /afs/andrew.cmu.edu/system/src/local/../host/oldsmail/016/src: usersmtp.c~
diff -cr ./src/util.c /afs/andrew.cmu.edu/system/src/local/../host/oldsmail/016/src/util.c
*** ./src/util.c	Mon Jul 19 23:50:45 1993
--- /afs/andrew.cmu.edu/system/src/local/../host/oldsmail/016/src/util.c	Mon Jul 26 17:17:10 1993
***************
*** 1034,1039 ****
--- 1034,1091 ----
  			return (FALSE);
  	return (TRUE);
  }
+ 
+ #ifdef RCPTSTREAM
+ /***********************************************************************
+  *
+  * RCPT streaming code by John G Myers, jgm+@cmu.edu
+  * This is not supported by the maintainer of sendmail.
+  * Report all bugs concerning RCPT streaming to jgm+@cmu.edu
+  *
+  ***********************************************************************
+  */
+ 
+ #include <fcntl.h>
+ 
+ /*
+ **  NONBLOCK -- set or clear non-blocking mode on file descriptor
+ **
+ **	Parameters:
+ **		fd -- the file descriptor
+ **		mode -- TRUE to set non-blocking mode
+ **			FALSE to clear non-blocking mode
+ **
+ **	Returns:
+ **		none
+ **
+ **	Side Effects:
+ **		modifies nonblocking status of fd
+ */
+ 
+ nonblock(fd, mode)
+ int fd;
+ bool mode;
+ {
+     int flags;
+ 
+     flags = fcntl(fd, F_GETFL, 0);
+     if (mode) {
+ #ifdef FNONBIO
+ 	flags |= FNONBIO;
+ #else
+ 	flags |= O_NDELAY;
+ #endif
+     }
+     else {
+ #ifdef FNONBIO
+ 	flags &= ~FNONBIO;
+ #else
+ 	flags &= ~O_NDELAY;
+ #endif
+     }
+     fcntl(fd, F_SETFL, flags);
+ }
+ #endif
  /*
  **  STRCONTAINEDIN -- tell if one string is contained in another
  **